leetcode-com-explore-challenge-card-july-leetcoding-challenge-546-week-3-july-15th-july-21st-03396.cpp

class Solution {
public:
    ListNode* removeElements(ListNode* head, int val) {
     if(head==NULL){
         return NULL;
     }  
     if(head->val==val){
         return removeElements(head->next,val);
     }
        head->next=removeElements(head->next,val);
        return head;
    }
};